Red blood is the exception, not the rule. Evolution has painted it green, purple and white in animals that push physiology ...

A pigment that makes feathers and hair orange helps prevent cellular damage by removing excess cysteine from cells.

The animal world is incredibly colorful, and behind this color palette is a constant game of survival. Subscribe to our newsletter for the latest sci-tech news updates. Most animals use camouflage, ...

Peacocks, panther chameleons, scarlet macaws, clown fish, toucans, blue-ringed octopuses, and so many more: The animal kingdom has countless denizens with extraordinarily colorful beauty. But in many ...

If you are familiar with the spectacle of a matador waving a red cape to enrage a bull so that it will charge, you may ...